I’m waiting for the right moment to tell my parents that I think I have ocd but I’m too scared so in the mean time should I still try to not do compulsions and try to accept uncertainty or will that not help

Speaking as an unprofessional, doing some individual ERP and learning to accept uncertainty seems helpful while you're building up the courage to tell your parents

I don't know your family dynamic or the effect is has on you. I do know that I could have asked this same question when I was younger. So with the benefit of a number of years of experience with this condition I will say that ultimately, regardless of when you tell them, you are in charge of your treatment. So, keep doing what you need to do for your own happiness and when the time is right to bring them in, you'll know. You hold the power; you are in control. You may even gain additional insight along the way that will help you explain it to them more effectively when the time comes. Ultimately, you are the one who will get you through this. You're loved ones and this community will be here for you when you need encouragement. All is well.